I upgraded to T100S irons. To break them in I played 5 rounds at the various courses at Bandon Dunes a week after the US Amateur. The clubs were definitely a step up from my Apex Pros. Good ball flight in the strong winds at Old Mac and Bandon. Very happy I made the switch. It took me a long time to make the switch but I'm glad I did. Anybody else liking their T100S clubs?